| /* |
| * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.incubator.http; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.OptionalLong; |
| import java.util.TreeMap; |
| import java.util.function.Predicate; |
| import static java.util.Collections.emptyList; |
| import static java.util.Collections.emptyMap; |
| import static java.util.Collections.unmodifiableList; |
| import static java.util.Collections.unmodifiableMap; |
| import static java.util.Objects.requireNonNull; |
| |
| final class ImmutableHeaders implements HttpHeaders { |
| |
| private final Map<String, List<String>> map; |
| |
| public static ImmutableHeaders empty() { |
| return of(emptyMap()); |
| } |
| |
| public static ImmutableHeaders of(Map<String, List<String>> src) { |
| return of(src, x -> true); |
| } |
| |
| public static ImmutableHeaders of(Map<String, List<String>> src, |
| Predicate<? super String> keyAllowed) { |
| requireNonNull(src, "src"); |
| requireNonNull(keyAllowed, "keyAllowed"); |
| return new ImmutableHeaders(src, keyAllowed); |
| } |
| |
| private ImmutableHeaders(Map<String, List<String>> src, |
| Predicate<? super String> keyAllowed) { |
| Map<String, List<String>> m = new TreeMap<>(String.CASE_INSENSITIVE_ORDER); |
| src.entrySet().stream() |
| .filter(e -> keyAllowed.test(e.getKey())) |
| .forEach(e -> |
| { |
| List<String> values = new ArrayList<>(e.getValue()); |
| m.put(e.getKey(), unmodifiableList(values)); |
| } |
| ); |
| this.map = unmodifiableMap(m); |
| } |
| |
| @Override |
| public Optional<String> firstValue(String name) { |
| return allValues(name).stream().findFirst(); |
| } |
| |
| @Override |
| public OptionalLong firstValueAsLong(String name) { |
| return allValues(name).stream().mapToLong(Long::valueOf).findFirst(); |
| } |
| |
| @Override |
| public List<String> allValues(String name) { |
| requireNonNull(name); |
| List<String> values = map.get(name); |
| // Making unmodifiable list out of empty in order to make a list which |
| // throws UOE unconditionally |
| return values != null ? values : unmodifiableList(emptyList()); |
| } |
| |
| @Override |
| public Map<String, List<String>> map() { |
| return map; |
| } |
| } |